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I think the primary use case is building the same code on multiple platforms. A developer can write a single CMakeFile and then CMake will generate Makefiles/Ninja files/VS soln files/etc depending on the underlying platform.

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I've used CMake for a number of larger projects. When you start having to deal with external dependencies or cross platform support it definitely fills in some of the holes in the C-style build ecosystems

One of the things I've never been a fan of is that for whatever reason, the build steps that you see in basically every project are: - mkdir ./build - cd ./build - cmake configure ../ - make build

Has no one thought of simplifying that??

Yes, we write a shell script and move on.

You can simplify it to cmake -B build && make -C build for example

https://github.com/jcelerier/cninja

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